CN103580585A - Motor driving device - Google Patents
Motor driving device Download PDFInfo
- Publication number
- CN103580585A CN103580585A CN201310291284.XA CN201310291284A CN103580585A CN 103580585 A CN103580585 A CN 103580585A CN 201310291284 A CN201310291284 A CN 201310291284A CN 103580585 A CN103580585 A CN 103580585A
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- signal
- input
- reference signal
- motor drive
- speed
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- 239000003990 capacitor Substances 0.000 claims description 17
- 238000002955 isolation Methods 0.000 claims description 15
- 238000009413 insulation Methods 0.000 claims description 5
- 230000000052 comparative effect Effects 0.000 claims 1
- 102100039435 C-X-C motif chemokine 17 Human genes 0.000 description 10
- 101000889048 Homo sapiens C-X-C motif chemokine 17 Proteins 0.000 description 10
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/08—Arrangements for controlling the speed or torque of a single motor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/22—Optical devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
- H02K11/33—Drive circuits, e.g. power electronics
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/34—Modelling or simulation for control purposes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
Provided is a motor driving device. An objective of the invention is to provide the motor driving device whose structure is simplified aim at an interface of an input device related to instructions of motor speed. In the motor driving device (21) that changes a rotation speed of a motor (2) pursuant to a speed command (S2) includes a main device including a drive circuit configured to drive the motor, an input device configured to input the speed command (S2) to the drive circuit, and a signal insulating unit (22) configured to insulate the input device from the main device and to transmit the speed command (S2) from the input device to the drive circuit of the main device.
Description
Technical field
The present invention relates to a kind of in freezing show window or refrigerator etc., for making the motor drives such as fan motor of cold air forced circulation.
Background technology
In the past, in the fan motor that makes cold air forced circulation in freezing show window or refrigerator etc., preferably keep fixing rotating speed or carry out speed-changing according to situation in case, and according to the program arranging in advance, rotating speed being changed, by motor drive, carrying out the control of this rotating speed.From viewpoints such as power saving, easy controls, the driven object of this motor drive is used brushless motor mostly.In this case, the rectification circuit of motor drive, to brushless motor, provide a part of structures such as drive circuit of drive current to be contained in motor shell.
And in ， convenience store or supermarket, require many show cases of centralized management, or manage respectively show case in recent years.Therefore expect to control respectively the rotating speed of the fan motor that is arranged at each show case, therefore, in motor drive, being provided with can be from the interface of external control rotating speed.
Fig. 6 is the module map that can illustrate together with driven object from the motor drive of the interface of external control rotating speed having.The fan motor 2 of the driven object of this motor drive 1 for being formed by 3-phase brushless motor.In this motor drive 1, via noise filter 4 and reactor 5 input ACs (AC) 100V or exchange the source power supply 3 of (AC) 200V, by rectification circuit 6, carry out rectification, thus, generate the DC power supply of 140V or 280V.And 7 is smmothing capacitor.Motor drive 1 is being in the adjuster 8 of switch mode power, by the DC power supply generating by rectification circuit 6, generates the power supply for work.
And, in motor drive 1, the speed command based on pulse-width signal is input to driver 11 from input unit 10, and, obtain and be arranged at Hall element 10A, the 10B of fan motor 2, the output signal of 10C.Driver 11 be take the current rotating speed grasped by the output signal of Hall element 10A～10C and is generated and output drive signal as the mode by the indicated rotating speed of speed command.Power module 12, according to the driving signal from driver 11 outputs, is connected each phase U of fan motor 2, V, W with the DC power supply of exporting by rectification circuit 6.Thus in motor drive 1, to rotarily actuate fan motor 2 according to the rotating speed of speed command.Motor drive 1 detects the drive current of the fan motor 2 driving by this way by the terminal voltage of the current measuring element 13 that formed by resistor at driver 11 in addition, and with this drive current, be no more than the mode of fixed reference value, according to the output signal of Hall element 10A～10C, control the opportunity being driven by power module 12.In addition, in the structure shown in Fig. 6, rectification circuit 6, smmothing capacitor 7, adjuster 8, Hall element 10A, 10B, 10C, driver 11, power module 12 and current measuring element 13 are contained in motor shell.
Yet, in the situation that arrange as described above, can, from the interface of external control rotating speed, need to meet the safe benchmark identical with the desired safe benchmark of fan motor with this interface related input unit 10.More particularly, because the drivetrain of fan motor is connected with source power supply, therefore need to meet the safe benchmark such as UL while using source power supply.In the situation that not taking any method, the input unit 10 relevant to the control of speed also needs to meet this safe benchmark, for electric shock, lightning impulse, noise etc., also needs to consider a lot of countermeasures, consequently, and the problem that exists structure to become complicated.
Summary of the invention
The present invention has considered above problem points and the invention carried out, and compared with the past, object is by the designs simplification of the interface related input unit of controlling with speed.
In order to reach this object, the present inventor according to from agent set by the conception of the structure electric insulation of output speed instruction, completed the present invention.
That is to say, the related motor drive of the preferred embodiment of the present invention adopts following structure: the motor drive of rotating speed that changes motor according to the speed command from input unit output, via insulating between input and output and pass on the signal isolation portion of described speed command to input described speed command between input and output.
According to the present invention, the input unit of input speed indication can form as long as meet the mode of looser safe benchmark needn't meet the desired safe benchmark of source power supply.Compared with the past thus, further simplified structure.
In motor drive involved in the present invention, by using photoelectrical coupler as signal isolation portion, can guarantee sufficient frequency band and transfer rate instruction, and can be applicable to various forms of speed commands transmission.And the pulse-width signal that pulse duration changes according to the rotating speed of the related motor of indication if using is as speed command, in structure more specifically, compared with the past, further simplified structure.
And, described input unit is configured to and has reference signal generation circuit and the first comparison circuit, described reference signal produces circuit evolving as the reference signal of the generation benchmark of pulse-width signal, and described the first comparison circuit compares and generate pulse-width signal by speed instruction voltage and the described reference signal of indication rotating speed.And, described reference signal can be made as to the signal of the Charge-discharge wave shape that signal level changes under fixed frequency, signal sharply when signal level variation when signal level rises declines than signal level.Thus, in pulse-width signal, in the side's side in rising edge and trailing edge, keeping under the state on fixing opportunity roughly, the change on opportunity that can be by the opposing party edge generates pulse-width signal.
And, if described reference signal is produced to circuit as the structure of controlling discharging and recharging of described capacitor and generating described reference signal by the terminal voltage of capacitor being input to the output of the second comparison circuit of input, using described input unit as by the power supply dividing potential drop of the second comparison circuit and the structure of formation speed command voltage, can be not to be subject to the mode of the impact that the change of supply voltage produces to generate pulse-width signal.
The detailed description of the following preferred embodiment of the present invention being carried out with reference to accompanying drawing can allow above-mentioned execution mode of the present invention and other features, key element, method, effect and characteristic clearer and more definite.
Accompanying drawing explanation
According to the detailed description of describing referring to accompanying drawing, can better understand the present invention.In addition, accompanying drawing, for illustration, does not limit the present invention.
Fig. 1 is the module map of the related motor drive of the first execution mode of the present invention.
Fig. 2 is the connection layout of input unit that the motor drive of Fig. 1 is shown.
Fig. 3 is for the signal waveforms of reference signal is described.
Fig. 4 is for the signal waveforms of pulse-width signal is described.
Fig. 5 is the signal waveforms that the relation between speed instruction voltage and pulse-width signal is shown.
Fig. 6 is the module map that motor drive is in the past shown.
Embodiment
Referring to accompanying drawing explanation embodiments of the invention.
1. the first execution mode
Fig. 1 is by the module map shown in the related motor drive of the first execution mode of the present invention and earlier figures 6 contrasts.In this motor drive 21, at the leading portion of driver 11, be provided with signal isolation portion 22.And being provided with by working for for example dry cell of secondary power supply at the input unit relevant to speed command 23, and the structure relevant to signal isolation portion 22.Here, signal isolation portion 22, for after guaranteeing between input unit 23 and agent set fully insulation, is communicated to speed command the structure of agent set from input unit 23, for example, photoelectrical coupler, consist of.Except this signal isolation portion 22 and relational structure difference, it is identical with motor drive 1 illustrated in fig. 6 that the motor drive 21 of this execution mode is configured to.By the structure relevant to this signal isolation portion 22, in motor drive 21, about indicating the interface of the rotating speed of motor, input relevant input unit 23 to the indication of speed and can meet the desired safe benchmark of source power supply, and form only to meet the mode of looser safe benchmark, thus, compared with the past, further simplified structure.
Fig. 2 is the module map that the structure relevant to this input unit 23 is shown.Input unit 23 produces circuit 25 by reference signal and is created on necessary reference signal S1 in the generation of pulse-width signal.Here, although reference signal S1 can apply the signals such as triangular wave that signal level changes according to fixed frequency, Sawtooth waves, but in this embodiment,, the time constant while applying with decline is compared, the especially little Charge-discharge wave shape of time constant during rising.
Specifically, in reference signal, produce in circuit 25, the output of comparison circuit U2 is by the series circuit ground connection of resistance R 5 and capacitor C1.The series circuit and the resistance R 5 that by diode D1 and resistance R 6 using anode as capacitor C1 side, are formed are connected in parallel.Thus, if the output of comparison circuit U2 rises, reference signal produces circuit 25 with the less time constant of the parallel circuits that is comprised of resistance R 5 and resistance R 6, the terminal voltage of raising capacitor C1.In contrast, if the output of comparison circuit U2 declines, with a time constant for the circuit being comprised of resistance R 5, during than rising, large time constant reduces the terminal voltage of capacitor C1.
The terminal voltage of capacitor C1 is imported into the inverting input of comparison circuit U2, if more than the terminal voltage of capacitor C1 rises to the terminal voltage of non-inverting input, the output end voltage of comparison circuit U2 declines.Output end voltage decline due to this comparison circuit U2, the terminal voltage of capacitor C1 declines gradually, if the terminal voltage of capacitor C1 drops to lower than the terminal voltage of non-inverting input, the output end voltage of comparison circuit U2 rises, and the terminal voltage of capacitor C1 rises.Here, by the series circuit being formed by resistance R 3 and resistance R 4, the reference voltage of supply voltage VCC1 dividing potential drop is imported into the non-inverting input of comparison circuit U2.This non-inverting input is connected with supply voltage VCC1 by the series circuit being comprised of with resistance R 2 resistance R 1, and the output of comparison circuit U2 connects with the mid point that is connected of the series circuit that should be comprised of with resistance R 2 resistance R 1.Comparison circuit U2, in the situation that improving output and in the situation that reducing output, switches the terminal voltage of non-inverting input thus, guarantees hysteresis characteristic.
Fig. 3 is the signal waveforms that the relation between the terminal voltage S1 of capacitor C1 and the voltage V1 of non-inverting input is shown.If here by resistance R 3, the resistance value of resistance R 4 is set to respectively R3, R4, resistance R 1 is set to R14 with the parallel resistance value of resistance R 4, resistance R 1 is set to R13 with the parallel resistance value of resistance R 3, in the situation that the decline of the output of comparison circuit U2, the voltage V1 of non-inverting input becomes VCC1 * { R14/(R14+R3) }, on the other hand, if the output of comparison circuit U2 rises, the voltage V1 of noninverting output becomes VCC1 * { R4/(R4+R13) }, thus, can guarantee hysteresis characteristic and generate Charge-discharge wave shape S1.
When signal isolation portion 22 is connected by resistance R 9 light-emitting diode that is arranged at the U3 of photoelectric coupling portion with power supply VCC1, the anode of light-emitting diode is connected with the output of comparison circuit U1, and the light accepting part side output of the U3 of photoelectric coupling portion is exported as speed command.Fig. 5 illustrates from the pulse-width signal S2 of the U3 of this photoelectric coupling portion output and the figure of the relation between speed instruction voltage V2.According to this Fig. 5, even in the situation that realizing insulation by the U3 of photoelectric coupling portion, also can there is no a bit problem and export the speed command being produced by pulse-width signal.
According to present embodiment, guarantee between input unit and agent set fully state of insulation by signal isolation portion 22 after, due to speed command is communicated to agent set from input unit, therefore the input unit of the indication of input speed needn't meet the desired safe benchmark of source power supply, and can form only to meet the mode of looser safe benchmark, compared with the past thus, further simplified structure.
And, by forming signal isolation portion 22 by photoelectrical coupler U3, can guarantee that signal isolation portion 22 has sufficient frequency band, thus, can be widely used in various forms of speed commands and transmit.
And, because speed command is the pulse-width signal that pulse duration changes according to the rotating speed of motor, therefore compared with the past, further simplified structure.Now, generate such reference signal: the Charge-discharge wave shape sharply of signal level variation when signal level variation when this reference signal rises based on signal level declines than signal level.Owing to generating pulse-width signal by this reference signal, thus the side in rising edge and trailing edge, can be under the state being substantially maintained fixed opportunity, the change on the opportunity by opposite side edge generates pulse-width signal.Therefore, in control a side of motor speed by pulse-width signal, can be only by controlling the speed of motor the opportunity of opposite side, therefore can be by designs simplification.
And, by discharging and recharging of circuit U 2 based on the comparison, control and generate this reference signal, owing to will controlling relevant power supply VCC1 dividing potential drop and formation speed command voltage to discharging and recharging of this comparison circuit U2 by variable resistor, so can be with the mode formation speed command voltage of the variation in voltage of tracking power supply VCC1 accurately, thus, even in the situation that the amplitude of reference signal S1 is because of the variation in voltage change of power supply VCC1, speed command S2 based on pulse-width signal also can not be subject to the impact of power supply voltage variation, and can control more accurately the rotating speed of fan motor 2.
2. other execution modes
Above, describe the preferred concrete structure of embodiments of the present invention institute in detail, but in being no more than the scope of purport of the present invention, the structure of above-mentioned execution mode can be carried out various changes.For example, in the above-described embodiment, described the situation that is formed signal isolation portion by photoelectrical coupler, but the present invention is not limited to this mode, such as also forming signal isolation portion by insulating transformer etc.
And, in above-mentioned example, described the situation of passing on speed command by pulse-width signal, but the present invention is not limited thereto, can be widely used in, such as passing on speed command etc. by frequency modulated signal etc., by multi-signal, passing on the situation of speed command.
And, in the above-described embodiment, described the situation that drives the fan motor being formed by 3-phase brushless motor, but the present invention is not limited thereto, and can be widely used in driving the situation of various motors.
Claims (5)
1. basis, from a motor drive for the rotating speed of the speed command change motor of input unit output, is characterized in that,
Via making between input and output insulation and passing on the signal isolation portion of described speed command to input described speed command between input and output.
2. motor drive according to claim 1,
Described signal isolation portion is photoelectrical coupler.
3. motor drive according to claim 1,
Described speed command is the pulse-width signal that pulse duration changes according to the rotating speed of the related motor of indication.
4. motor drive according to claim 3,
Described input unit has reference signal and produces circuit and the first comparison circuit, described reference signal produces circuit evolving as the reference signal of the generation benchmark of pulse-width signal, described the first comparison circuit generates pulse-width signal by the indication speed instruction voltage of rotating speed and described reference signal are compared and export comparative result
The signal that described reference signal is the Charge-discharge wave shape that signal level changes under fixed frequency, signal level variation when signal level variation when signal level rises declines than signal level sharply.
5. motor drive according to claim 4,
Described reference signal produces circuit by the terminal voltage of capacitor being input to the output of the second comparison circuit of input, and that controls described capacitor discharges and recharges and generate described reference signal,
Described input unit generates described speed instruction voltage by the power supply dividing potential drop of described the second comparison circuit.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JPJP2012-176744 | 2012-08-09 | ||
| JP2012176744A JP2014036513A (en) | 2012-08-09 | 2012-08-09 | Motor drive |
| JP2012-176744 | 2012-08-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103580585A true CN103580585A (en) | 2014-02-12 |
| CN103580585B CN103580585B (en) | 2016-08-17 |
Family
ID=50051677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310291284.XA Active CN103580585B (en) | 2012-08-09 | 2013-07-11 | Motor drive |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US9281730B2 (en) |
| JP (1) | JP2014036513A (en) |
| CN (1) | CN103580585B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6372981B2 (en) * | 2013-08-23 | 2018-08-15 | 日本電産サーボ株式会社 | Motor drive device |
| US9762153B2 (en) | 2013-10-18 | 2017-09-12 | Black & Decker Inc. | Cycle-by-cycle current limit for power tools having a brushless motor |
| US9314900B2 (en) | 2013-10-18 | 2016-04-19 | Black & Decker Inc. | Handheld grinder with a brushless electric motor |
| US10050572B2 (en) | 2014-12-19 | 2018-08-14 | Black & Decker Inc. | Power tool with electric motor and auxiliary switch path |
| CN114614912A (en) * | 2022-03-04 | 2022-06-10 | 卧龙电气驱动集团股份有限公司 | Motor information identification method, upper computer, system, equipment and medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0538184A (en) * | 1991-07-24 | 1993-02-12 | Matsushita Electric Ind Co Ltd | Driver for brushless motor |
| JP2003204692A (en) * | 2002-01-09 | 2003-07-18 | Sanyo Electric Co Ltd | Pwm drive circuit for motor |
| US20080224643A1 (en) * | 2007-03-16 | 2008-09-18 | Kenji Sakurai | Semiconductor device for driving motor, three-phase motor and motor driving apparatus with the semiconductor device and fan motor |
| CN101604945A (en) * | 2008-06-10 | 2009-12-16 | 日本电产芝浦株式会社 | Control device of electric motor |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57119686A (en) * | 1981-01-14 | 1982-07-26 | Yaskawa Electric Mfg Co Ltd | Control device for motor |
| JPS63217818A (en) * | 1987-03-06 | 1988-09-09 | Nippon Denso Co Ltd | Triangle wave generator |
| JP3290481B2 (en) * | 1992-12-03 | 2002-06-10 | 東芝キヤリア株式会社 | Refrigeration cycle control device |
| GB9521332D0 (en) * | 1995-10-18 | 1995-12-20 | Switched Reluctance Drives Ltd | Current control circuit for a reluctance machine |
| JP3965791B2 (en) | 1998-07-23 | 2007-08-29 | 松下電器産業株式会社 | Fan motor for refrigeration equipment |
| JP2002336148A (en) * | 2001-05-18 | 2002-11-26 | Toto Ltd | Bath apparatus |
| JP2004260965A (en) | 2003-02-27 | 2004-09-16 | Matsushita Electric Ind Co Ltd | Fan |
| JP2004275388A (en) * | 2003-03-14 | 2004-10-07 | Aisin Seiki Co Ltd | Safety controller for sewing machine |
| JP4454328B2 (en) * | 2004-01-29 | 2010-04-21 | 三洋電機株式会社 | Motor driving device, integrated circuit, and motor driving method |
| EP2283294B1 (en) * | 2008-03-26 | 2017-03-01 | LG Electronics Inc. | Method and system for driving a drawer of a refrigerator |
| JP5450470B2 (en) * | 2011-01-26 | 2014-03-26 | パナソニック株式会社 | Sawtooth generator |
-
2012
- 2012-08-09 JP JP2012176744A patent/JP2014036513A/en active Pending
-
2013
- 2013-07-11 CN CN201310291284.XA patent/CN103580585B/en active Active
- 2013-07-24 US US13/949,484 patent/US9281730B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0538184A (en) * | 1991-07-24 | 1993-02-12 | Matsushita Electric Ind Co Ltd | Driver for brushless motor |
| JP2003204692A (en) * | 2002-01-09 | 2003-07-18 | Sanyo Electric Co Ltd | Pwm drive circuit for motor |
| US20080224643A1 (en) * | 2007-03-16 | 2008-09-18 | Kenji Sakurai | Semiconductor device for driving motor, three-phase motor and motor driving apparatus with the semiconductor device and fan motor |
| CN101604945A (en) * | 2008-06-10 | 2009-12-16 | 日本电产芝浦株式会社 | Control device of electric motor |
Non-Patent Citations (1)
| Title |
|---|
| 赵成刚: "三角波发生器改进分析", 《科技风》, no. 2, 31 January 2010 (2010-01-31) * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20140042878A1 (en) | 2014-02-13 |
| CN103580585B (en) | 2016-08-17 |
| JP2014036513A (en) | 2014-02-24 |
| US9281730B2 (en) | 2016-03-08 |
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